1 /*
2 * Copyright (C) 2009 Joshua Oreman <oremanj@rwcr.net>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 */
19
20 FILE_LICENCE ( GPL2_OR_LATER );
21
22 #include <stdio.h>
23 #include <string.h>
24 #include <errno.h>
25 #include <ipxe/net80211.h>
26 #include <ipxe/ethernet.h>
27 #include <usr/ifmgmt.h>
28 #include <usr/iwmgmt.h>
29
30 /** @file
31 *
32 * Wireless network interface management
33 *
34 */
35
36 /**
37 * Print status of 802.11 device
38 *
39 * @v dev 802.11 device
40 */
iwstat(struct net80211_device * dev)41 void iwstat ( struct net80211_device *dev ) {
42
43 ifstat ( dev->netdev );
44
45 printf ( " [802.11 ");
46 if ( dev->state & NET80211_ASSOCIATED ) {
47 printf ( "SSID '%s', ", dev->essid );
48 } else {
49 printf ( "not associated, " );
50 }
51 if ( dev->channel < dev->nr_channels && dev->rate < dev->nr_rates ) {
52 printf ( "Ch:%d Sig:%d", dev->channels[dev->channel].channel_nr,
53 dev->last_signal );
54 switch ( dev->hw->signal_type ) {
55 case NET80211_SIGNAL_NONE:
56 printf ( "?" );
57 break;
58 case NET80211_SIGNAL_ARBITRARY:
59 printf ( "/%d", dev->hw->signal_max );
60 break;
61 case NET80211_SIGNAL_DB:
62 printf ( "/%d dB", dev->hw->signal_max );
63 break;
64 case NET80211_SIGNAL_DBM:
65 printf ( " dBm" );
66 break;
67 }
68 printf ( ", Qual:%d%% Rate:%d Mbps]\n",
69 ( dev->rx_beacon_interval == 0 ? 0 :
70 100 * dev->tx_beacon_interval /
71 dev->rx_beacon_interval ),
72 dev->rates[dev->rate] / 10 );
73 } else {
74 printf ( "antenna off]\n" );
75 }
76
77 if ( dev->state & NET80211_WORKING ) {
78 printf ( " [associating" );
79 if ( dev->associating )
80 printf ( " to '%s'", dev->associating->essid );
81 printf ( "...]\n" );
82 }
83 }
84
85 /** Identifiers for 802.11 cryptography types, indexed by type number */
86 static const char *crypto_types[] = {
87 [NET80211_CRYPT_NONE] = "Open",
88 [NET80211_CRYPT_WEP] = "WEP ",
89 [NET80211_CRYPT_TKIP] = "WPA ",
90 [NET80211_CRYPT_CCMP] = "WPA2",
91 [NET80211_CRYPT_UNKNOWN] = "UNK ",
92 };
93
94 /** Number of 802.11 cryptography types defined */
95 #define NR_CRYPTO_TYPES ( sizeof ( crypto_types ) / sizeof ( crypto_types[0] ) )
96
97 /** Identifiers for 802.11 authentication types, indexed by type number */
98 static const char *auth_types[] = {
99 [NET80211_SECPROT_NONE] = "",
100 [NET80211_SECPROT_PSK] = "PSK",
101 [NET80211_SECPROT_EAP] = "802.1X",
102 [NET80211_SECPROT_UNKNOWN] = "UNK",
103 };
104
105 /** Number of 802.11 authentication types defined */
106 #define NR_AUTH_TYPES ( sizeof ( auth_types ) / sizeof ( auth_types[0] ) )
107
108 /**
109 * Scan for wireless networks using 802.11 device
110 *
111 * @v dev 802.11 device
112 * @v active Whether to use active scanning
113 *
114 * The list of networks found will be printed in tabular format.
115 *
116 * This function is safe to call at all times, whether the 802.11
117 * device is open or not, but if called while the auto-association
118 * task is running it will return an error indication.
119 */
iwlist(struct net80211_device * dev)120 int iwlist ( struct net80211_device *dev ) {
121 struct net80211_probe_ctx *ctx;
122 struct list_head *networks;
123 struct net80211_wlan *wlan;
124 char ssid_buf[22];
125 int rc;
126 unsigned i;
127 int was_opened = netdev_is_open ( dev->netdev );
128 int was_channel = dev->channels[dev->channel].channel_nr;
129
130 if ( ! was_opened ) {
131 dev->state |= NET80211_NO_ASSOC;
132 rc = netdev_open ( dev->netdev );
133 if ( rc < 0 )
134 goto err;
135 }
136
137 if ( dev->state & NET80211_WORKING ) {
138 rc = -EINVAL;
139 goto err_close_netdev;
140 }
141
142 if ( ! was_opened ) {
143 rc = net80211_prepare_probe ( dev, dev->hw->bands, 0 );
144 if ( rc < 0 )
145 goto err_close_netdev;
146 }
147
148 ctx = net80211_probe_start ( dev, "", 0 );
149 if ( ! ctx ) {
150 rc = -ENOMEM;
151 goto err_close_netdev;
152 }
153
154 while ( ! ( rc = net80211_probe_step ( ctx ) ) ) {
155 step();
156 }
157
158 networks = net80211_probe_finish_all ( ctx );
159
160 if ( list_empty ( networks ) ) {
161 goto err_free_networks;
162 }
163
164 rc = 0;
165
166 printf ( "Networks on %s:\n\n", dev->netdev->name );
167
168 /* Output format:
169 * 0 1 2 3 4 5 6
170 * 0123456789012345678901234567890123456789012345678901234567890
171 * [Sig] SSID BSSID Ch Crypt/Auth
172 * -------------------------------------------------------------
173 * [ 15] abcdefghijklmnopqrst> 00:00:00:00:00:00 11 Open
174 * ... or WPA PSK etc.
175 */
176
177 /* Quoting the dashes and spaces verbatim uses less code space
178 than generating them programmatically. */
179 printf ( "[Sig] SSID BSSID Ch Crypt/Auth\n"
180 "-------------------------------------------------------------\n" );
181
182 list_for_each_entry ( wlan, networks, list ) {
183
184 /* Format SSID into 22-character string, space-padded,
185 with '>' indicating truncation */
186
187 snprintf ( ssid_buf, sizeof ( ssid_buf ), "%s", wlan->essid );
188 for ( i = strlen ( ssid_buf ); i < sizeof ( ssid_buf ) - 1;
189 i++ )
190 ssid_buf[i] = ' ';
191 if ( ssid_buf[sizeof ( ssid_buf ) - 2] != ' ' )
192 ssid_buf[sizeof ( ssid_buf ) - 2] = '>';
193 ssid_buf[sizeof ( ssid_buf ) - 1] = 0;
194
195 /* Sanity check */
196 if ( wlan->crypto >= NR_CRYPTO_TYPES ||
197 wlan->handshaking >= NR_AUTH_TYPES )
198 continue;
199
200 printf ( "[%3d] %s %s %2d %s %s\n",
201 wlan->signal < 0 ? 100 + wlan->signal : wlan->signal,
202 ssid_buf, eth_ntoa ( wlan->bssid ), wlan->channel,
203 crypto_types[wlan->crypto],
204 auth_types[wlan->handshaking] );
205 }
206 printf ( "\n" );
207
208 err_free_networks:
209 net80211_free_wlanlist ( networks );
210
211 err_close_netdev:
212 if ( ! was_opened ) {
213 dev->state &= ~NET80211_NO_ASSOC;
214 netdev_close ( dev->netdev );
215 } else {
216 net80211_change_channel ( dev, was_channel );
217 }
218
219 if ( ! rc )
220 return 0;
221
222 err:
223 printf ( "Scanning for networks on %s: %s\n",
224 dev->netdev->name, strerror ( rc ) );
225 return rc;
226 }
227